Ontario Operator-in-Training (OIT) Practice Exam 2025 – Your All-in-One Guide to Certification Success!

Backflow siphonage typically occurs when there is negative pressure in the water main. This negative pressure can create a condition where water is drawn back into the potable water supply from non-potable sources, leading to potential contamination. This situation is often a result of sudden changes in the water system, such as a pipe break or excessive demand that creates a vacuum in the system.

Understanding backflow prevention is crucial for maintaining water quality. The creation of negative pressure can disrupt the normal flow of water, causing a siphoning effect where contaminants can enter the clean water supply. Effective management of water pressure, ensuring robust infrastructure, and implementing backflow prevention devices are essential strategies to mitigate these risks.